To determine whether a bathtub or shower is made of fiberglass or acrylic, there are several factors to consider:
- Examine the surface texture: Fiberglass tends to feel more textured, while acrylic is typically smooth and glossy.
- Perform a knock test: Tap the surface and listen to the sound. The sound may help identify the density of the material.
- Look for any repair signs: Fiberglass may have visible patches or repairs, whereas acrylic is less likely to show signs of repair.
- Consider the weight: Fiberglass is generally lighter than acrylic, so a lighter fixture may indicate fiberglass.
- Take into account the cost: Acrylic fixtures are usually more expensive than fiberglass ones.
By considering these factors, you can distinguish between the two common materials used in bathroom fixtures.
Understand Material Production
Fiberglass bathtubs are made by weaving fine glass strands into a mat, shaping it into a bathtub, and applying a gelcoat resin for a smooth finish. The resin seals the fibers and gives the tub a glossy appearance.
Acrylic bathtubs are created by heating a mixture of resins, petrochemicals, stabilizers, fillers, and dyes until liquefied, then pouring it into a mold. The shell is reinforced with fiberglass for strength and has a shiny, deep finish.
Acrylic tubs come in various colors, retain heat well, and are resistant to water damage and corrosion from minerals, making them more durable than fiberglass tubs.
In choosing between acrylic and fiberglass bathtubs, consider the construction materials—glass strands for fiberglass and resins for acrylic—as well as their durability and maintenance requirements.
Assess Surface Appearance
To identify the material of your bathtub and shower, inspect the surface. Acrylic usually has a smooth, glossy finish, while fiberglass has a more textured surface. Fiberglass may feel rougher, which can assist with grip but might attract more dirt. Acrylic surfaces are easier to clean and maintain their shine.
Although new acrylic and fiberglass units can look similar, acrylic typically feels warmer. Fiberglass structures can be more flexible and less rigid than acrylic, which offers better insulation and comfort during use.
To determine the material, note that acrylic will be shinier, smoother, and warmer, whereas fiberglass will be textured and possibly cooler to the touch.
Perform the Knock Test
To differentiate between fiberglass and acrylic bathtubs, use the knock test. Tap the side of the tub with your knuckle or a light tool and listen to the sound.
Fiberglass tubs produce a deeper, duller sound due to their thicker, less rigid makeup. Acrylic tubs make a higher-pitched, resonant noise because they are thinner and more rigid. This test helps identify the material when visual clues are insufficient.
However, the sound can vary with material thickness and construction, so consider additional methods for accurate identification.
The knock test aids in determining the appropriate maintenance, repair, or replacement of bathroom fixtures.
Examine for Damage and Repairs
Inspect the bathtub for wear or previous repairs to help determine if it is made of fiberglass or acrylic. Fiberglass tubs are prone to cracking and may have visible glass fibers at a crack's edge. Acrylic is less likely to crack but can scratch and dull, especially if cleaned with abrasive products.
Look for hairline cracks, common in fiberglass due to its porosity. Acrylic tubs are more durable but heavier, which may complicate installation. Observe any color fading at the tub's base, as fiberglass often fades with age and use. Patched areas or discoloration indicate past damage. Although acrylic retains color better, it can still fade or yellow from UV exposure or harsh chemicals.
For cleaning, use mild solutions like white vinegar on both fiberglass and acrylic tubs. Avoid harsh chemicals and abrasive cleaning tools to prevent damage and preserve the ability to identify the tub material.
Consider Installation and Price Differences
It's important for homeowners to understand the installation and cost differences between fiberglass and acrylic bathtubs.
Fiberglass tubs are typically more affordable because they are easier to manufacture. They may also be easier and less expensive to install due to their lighter weight and flexibility.
Acrylic tubs, on the other hand, are usually more expensive. This is because acrylic is a stronger material that is more resistant to damage, which means it could last longer and incur less maintenance costs over time. The installation of acrylic tubs can be more complex, potentially resulting in higher labor costs.
When choosing a bathtub, homeowners should consider both the initial price and potential long-term savings. It's advisable to consult with experts to ensure a thorough understanding of the costs involved.
This article has been reviewed by bathroom fixture expert Reed Nelson to ensure accurate information regarding the installation and price differences between acrylic and fiberglass bathtubs.
